El Capitan Lake — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in El Capitan Lake, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in El Capitan Lake today is 30.3°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating. It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUL 14 | 27.3°C | 26.1°C | |
| JUL 15 | 31.1°C | 26.1°C | |
| JUL 16 | 31.1°C | 26.1°C | |
| JUL 17 | 31.1°C | 26.1°C | |
| JUL 18 | 31.0°C | 26.1°C | |
| JUL 19 | 31.3°C | 26.1°C | |
| JUL 20 | 31.3°C | 26.1°C | |
| JUL 21 | 30.1°C | 26.1°C | |
| JUL 22 | 26.1°C | 30.1°C | |
| JUL 23 | 26.1°C | 29.9°C | |
| JUL 24 | 26.1°C | 29.7°C | |
| JUL 25 | 26.1°C | 29.5°C | |
| JUL 26 | 26.1°C | 29.3°C | |
| JUL 27 | 26.1°C | 29.0°C | |
| JUL 28 | 26.1°C | 28.8°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 9°C | 13°C | 18°C |
| February | 10°C | 14°C | 19°C |
| March | 13°C | 18°C | 23°C |
| April | 16°C | 20°C | 23°C |
| May | 18°C | 21°C | 25°C |
| June | 20°C | 24°C | 27°C |
| July | 21°C | 26°C | 32°C |
| August | 27°C | 30°C | 33°C |
| September | 25°C | 27°C | 30°C |
| October | 21°C | 24°C | 26°C |
| November | 16°C | 20°C | 23°C |
| December | 14°C | 16°C | 19°C |
El Capitan Lake: Water Temperature by Location
El Capitan Lake: Weather Forecast
July 22
July 23
July 24
July 25
July 26
Location & Local Information
El Capitan Reservoir (commonly called El Capitan Lake) in southern California typically exhibits seasonal surface temperatures that reflect the Mediterranean climate of the region. In winter the surface often falls into the low 50s to upper 50s °F (about 10–14 °C). Spring temperatures generally climb to roughly 55–68 °F (13–20 °C) as inflows warm. Peak summer surface readings commonly reach the upper 60s into the upper 70s °F (about 20–26 °C), especially in shallow, sun-exposed coves, while early fall usually holds moderate temperatures in the 60–72 °F range (16–22 °C). Because the reservoir stratifies, deeper water can remain much colder year-round, sometimes in the 40s–50s °F (4–15 °C), so actual exposure can be colder than surface values suggest.
Swimming in El Capitan Reservoir is generally not permitted for a combination of regulatory and safety reasons. The lake functions as a managed water supply and access rules aim to protect water quality; authorities also restrict direct-contact recreation to reduce contamination risks. Safety concerns—including sudden depth changes, cold deep water, submerged hazards and limited lifeguard presence—also factor into prohibitions or strong advisories against swimming. Boating and fishing are often allowed under specific rules, but anyone considering water activities should check current local regulations and conditions before visiting.